A method, system, device and medium for evaluating wind-resistant reinforcement effect of transmission tower

Abstract

The present invention provides a method, system, device and medium for evaluating the wind-resistant reinforcement effect of a transmission tower. The method comprises obtaining node information and physical parameters of each stiffening rib unit in an outer corner reinforcement device, obtaining the bending stiffness of the stiffening rib unit according to the node information and physical parameters, and then accumulating to obtain a system matrix of the stiffening ribs, and combining the obtained system matrix of the right-angle stiffening member in the outer corner reinforcement device to obtain the system matrix of the outer corner reinforcement device, and obtaining a first system force model according to the obtained system matrix of the first main material rod and the system matrix of the outer corner reinforcement device, and obtaining a second system force model according to the obtained system matrix of the transmission tower system and the first system force model, and establishing a second system wind load model and combining the second system force model to evaluate the wind-resistant reinforcement effect of the transmission tower. The present invention can quantitatively and accurately evaluate the wind-resistant reinforcement effect of the transmission tower and the stability of the reinforcement device, and has a wide range of application and high analysis accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of wind-resistant reinforcement of power transmission towers, and in particular to a method, system, computer equipment and storage medium for evaluating the wind-resistant reinforcement effect of power transmission towers based on an outer corner reinforcement device. Background Art

[0002] Transmission towers are important energy infrastructure and are widely used at home and abroad. Transmission towers are used outdoors for a long time, exposed to wind and sun, and subjected to various strong loads and harsh environments. The safety of their use is very important. The southern coastal areas of my country are strong typhoon areas. In recent years, many wind-induced collapse accidents of transmission towers have occurred, causing serious economic losses and secondary disasters. Therefore, it is of great practical significance to carry out wind-resistant reinforcement work on transmission towers and improve the ability of transmission towers to cope with strong winds.

[0003] At present, relevant research has been carried out on the wind-induced damage of transmission towers at home and abroad, and some different types of reinforcement devices have been proposed, such as main material reinforcement devices, oblique material reinforcement devices, transverse material reinforcement devices, dynamic vibration absorbers, energy dissipation dampers, etc., and the method of using reinforcement devices has the advantages of being simple and practical, low cost, and good environmental adaptability, and has received widespread attention. However, the work of wind-resistant reinforcement devices for transmission towers and their performance evaluation is mainly focused on the mechanical structure and device design and development of reinforcement devices. Although some new mechanical design and manufacturing methods for reinforcement devices have been proposed, there is a lack of corresponding wind-resistant reinforcement performance evaluation methods and systems, and it is impossible to reasonably and effectively evaluate the actual reinforcement effect of such devices after they are installed on actual transmission towers. For example, the outer corner reinforcement device, as a new type of reinforcement device, is applied to transmission towers, but its force performance cannot be accurately and effectively judged, and its wind-resistant reinforcement effect cannot be judged, and the use safety of transmission towers cannot be effectively evaluated and analyzed based on its wind-resistant reinforcement effect evaluation, which is not conducive to improving the operation and maintenance level of transmission towers in response to strong wind disasters.

[0004] Therefore, it is of great significance to systematically study the safety performance and wind-induced response characteristics of transmission towers after the installation of external corner reinforcement devices, establish an accurate and effective wind-induced response analysis method for transmission towers with external corner reinforcement devices installed, and conduct a reasonable and effective evaluation of their wind-resistant reinforcement effects. Summary of the invention

[0005] The purpose of the present invention is to provide a method for evaluating the wind-resistant reinforcement effect of a transmission tower. By establishing a mechanical model of the stiffening ribs of a reinforcement device and a mechanical model of a first system of an outer corner reinforcement device-main material, the outer corner reinforcement device and the transmission tower system are regarded as a complete second system, and a corresponding mechanical model is established. On this basis, a wind load model, a force balance equation and a wind-induced response analysis method of the second system of the reinforcement device-transmission tower system are established, so that the wind-resistant reinforcement effect of the transmission tower and the stability of the outer corner reinforcement device under wind load can be quantitatively and accurately evaluated.

[0006] In order to achieve the above objectives, it is necessary to provide a method, system, computer equipment and storage medium for evaluating the wind-resistant reinforcement effect of a transmission tower in response to the above technical problems.

[0007] In a first aspect, an embodiment of the present invention provides a method for evaluating the wind-resistant reinforcement effect of a transmission tower, the method comprising the following steps:

[0008] Obtaining node information and physical parameters of each stiffening rib unit in the outer corner reinforcement device; the node information includes node coordinates and stiffening rib geometric shape parameters; the physical parameters include elastic modulus, shear modulus and density;

[0009] According to the node information and physical parameters of each stiffening rib unit, the bending stiffness of the stiffening rib unit is obtained; the bending stiffness includes the y-axis bending stiffness, the z-axis bending stiffness and the inertia product;

[0010] According to the bending stiffness of the stiffening rib unit, a system matrix of the stiffening rib is obtained; the system matrix includes a stiffness matrix and a mass matrix;

[0011] Obtaining a system matrix of the right-angle reinforcement member in the outer corner reinforcement device, and obtaining a system matrix of the outer corner reinforcement device according to the system matrix of the stiffening rib and the right-angle reinforcement member;

[0012] Obtaining a system matrix of a first main member, and obtaining a first system force model according to the system matrix of the outer corner reinforcement device and the first main member; the first main member includes a plurality of main member units on which the outer corner reinforcement device is installed; the first system is composed of the outer corner reinforcement device and the first main member;

[0013] Obtaining a system matrix of a transmission tower system, and obtaining a second system force model according to the system matrix of the transmission tower system and the first system force model; the second system is composed of the first system and the transmission tower system; the transmission tower system includes a second main material rod, an oblique material and an auxiliary material; the second main material rod includes a plurality of main material rod units without an external corner reinforcement device installed;

[0014] A second system wind load model is established, and the wind-resistant reinforcement effect of the transmission tower is evaluated based on the second system wind load model and the second system force model.

[0015] In a second aspect, an embodiment of the present invention provides a system for evaluating the wind-resistant reinforcement effect of a transmission tower, the system comprising:

[0016] A data acquisition module, used to acquire node information and physical parameters of each stiffening rib unit in the outer corner reinforcement device; the node information includes node coordinates and stiffening rib geometric shape parameters; the physical parameters include elastic modulus, shear modulus and density;

[0017] The first calculation module is used to obtain the bending stiffness of the stiffening rib unit according to the node information and physical parameters of each stiffening rib unit; the bending stiffness includes the y-axis bending stiffness, the z-axis bending stiffness and the inertia product;

[0018] The second calculation module is used to obtain a system matrix of the stiffening rib according to the bending stiffness of the stiffening rib unit; the system matrix includes a stiffness matrix and a mass matrix;

[0019] A third calculation module is used to obtain a system matrix of the right-angle reinforcement member in the outer corner reinforcement device, and obtain a system matrix of the outer corner reinforcement device according to the system matrix of the stiffening rib and the right-angle reinforcement member;

[0020] A first modeling module is used to obtain a system matrix of a first main material member, and obtain a first system force model according to the system matrix of the outer corner reinforcement device and the first main material member; the first main material member includes a plurality of main material member units on which the outer corner reinforcement device is installed; the first system is composed of the outer corner reinforcement device and the first main material member;

[0021] A second modeling module is used to obtain a system matrix of a transmission tower system, and obtain a second system force model according to the system matrix of the transmission tower system and the first system force model; the second system is composed of the first system and the transmission tower system; the transmission tower system includes a second main material rod, an oblique material and an auxiliary material; the second main material rod includes a plurality of main material rod units without an external corner reinforcement device installed;

[0022] The effect evaluation module is used to establish a second system wind load model and evaluate the wind-resistant reinforcement effect of the transmission tower based on the second system wind load model and the second system force model.

[0023] In a third aspect, an embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0024] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0025] The above-mentioned application provides a method, system, computer equipment and storage medium for evaluating the wind-resistant reinforcement effect of a transmission tower. Through the method, it is achieved to obtain the node information and physical parameters of each stiffening rib unit in the external corner reinforcement device, obtain the bending stiffness of the stiffening rib unit according to the node information and physical parameters, and then accumulate to obtain the system matrix of the stiffening ribs, and combine the obtained system matrix of the right-angle reinforcement member in the external corner reinforcement device to obtain the system matrix of the external corner reinforcement device, and obtain the first system force model according to the obtained system matrix of the first main material member and the system matrix of the external corner reinforcement device, and obtain the second system force model according to the obtained system matrix of the transmission tower system and the first system force model, and establish a second system wind load model combined with the second system force model to evaluate the wind-resistant reinforcement effect of the transmission tower and the stability of the reinforcement device. Compared with the existing technology, the wind-resistant reinforcement effect evaluation method of the transmission tower can quantitatively and accurately evaluate the wind-resistant reinforcement effect of the transmission tower and the stability of the reinforcement device by establishing a wind load model, a force balance equation and a wind-induced response analysis method based on the influence of the geometric shape of the reinforcement device on the wind load, the influence of the stiffening rib angle on the wind-exposed area and wind load of the reinforcement device, and the influence of the wind-exposed area of ​​the main material blocked by the reinforcement device on the wind load of the tower system. It not only has the advantages of a wide range of applications and high analysis accuracy, but also can effectively improve the analysis and evaluation level of the wind-resistant reinforcement effect of the transmission tower and the stability of the reinforcement device, thereby improving the operation and maintenance level of the transmission tower in response to strong wind disasters. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of an application scenario of a method for evaluating wind-resistant reinforcement effect of a transmission tower in an embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of an external corner reinforcement device in an embodiment of the present invention;

[0028] Figure 3 1 is a flow chart of a method for evaluating wind-resistant reinforcement effect of a transmission tower in an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the connection between the outer corner reinforcement device and the main material in an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of the structure of a transmission tower with an external corner reinforcement device installed in an embodiment of the present invention;

[0031] Figure 6 2 is a schematic diagram of the structure of a transmission tower wind resistance reinforcement effect evaluation system according to an embodiment of the present invention;

[0032] Figure 7 It is a diagram of the internal structure of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and beneficial effects of the present application clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the embodiments described below are part of the embodiments of the present invention and are only used to illustrate the present invention, but are not used to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention provides a method for evaluating the wind-resistant reinforcement effect of a transmission tower, which can be applied to Figure 1 The terminal or server shown in the figure. The terminal can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers and portable wearable devices, and the server can be implemented by an independent server or a server cluster composed of multiple servers. The server can use the wind-resistant reinforcement effect evaluation method of the transmission tower of the present invention to collect Figure 2 The node information and physical parameters of each stiffening rib unit in the outer corner reinforcement device shown are used to establish the mechanical model of the stiffening rib of the reinforcement device and the mechanical model of the first system of the outer corner reinforcement device-main material. The outer corner reinforcement device and the transmission tower system are regarded as a complete second system to establish the corresponding mechanical model. On this basis, the wind load model and force balance equation of the second system of the reinforcement device-transmission tower system are established to perform wind-induced response analysis and reinforcement device stability analysis. The wind-resistant reinforcement effect of the transmission tower and the stability of the outer corner reinforcement device under wind load can be quantitatively and accurately evaluated, and the final analysis results are sent to the terminal for the terminal user to further analyze or guide the wind-resistant disaster prevention and operation and maintenance of the transmission line. It can effectively improve the analysis and evaluation level of the wind-resistant reinforcement effect of the transmission tower and the stability of the reinforcement device, thereby improving the operation and maintenance level of the transmission tower in response to strong wind disasters. The following embodiment will explain in detail the wind-resistant reinforcement effect evaluation method of the transmission tower of the present invention.

[0035] In one embodiment, Figure 3 As shown, a method for evaluating the wind-resistant reinforcement effect of a transmission tower is provided, comprising the following steps:

[0036] S11, obtaining the node information and physical parameters of each stiffening rib unit in the outer corner reinforcement device; the node information includes the node coordinates and the stiffening rib geometric shape parameters; the physical parameters include the elastic modulus, shear modulus and density; wherein the outer corner reinforcement device is as follows Figure 2As shown, it consists of two parts: a stiffening rib 1 and a right-angle stiffening member 2. The cross-section of the stiffening rib is a rectangle, and its width is b, height is h, and centroid is C. The corresponding node information and physical parameters can be obtained by existing methods, and no specific restrictions are made here.

[0037] S12. Obtain the bending stiffness of the stiffening rib unit according to the node information and physical parameters of each stiffening rib unit; the bending stiffness includes the y-axis bending stiffness, the z-axis bending stiffness and the inertia product; wherein, the bending stiffness of the stiffening rib unit refers to the bending stiffness of the stiffening rib unit around the coordinate system Ozy, which is calculated in the order of the bending stiffness around the centroid C, the bending stiffness around the center O of the outer corner reinforcement device and the bending stiffness around the coordinate system Ozy, and the influence of the stiffening rib angle θ on the windward area and wind load of the reinforcement device is considered in the calculation process. Specifically, the step of obtaining the bending stiffness of the stiffening rib unit according to the node information and physical parameters of each stiffening rib unit includes:

[0038] According to the node coordinates and the stiffening rib geometric shape parameters, the first bending stiffness of the corresponding stiffening rib unit is obtained; the first bending stiffness of the stiffening rib unit is the bending stiffness of the stiffening rib unit around the centroid;

[0039] According to the first bending stiffness of the stiffening rib unit, a second bending stiffness of the stiffening rib unit is obtained; the second bending stiffness of the stiffening rib unit is the bending stiffness of the stiffening rib unit around the center of the outer corner reinforcement device;

[0040] According to the second bending stiffness of the stiffening rib unit, the bending stiffness of the stiffening rib unit is obtained; the bending stiffness of the stiffening rib unit is the bending stiffness of the stiffening rib unit around the coordinate system Ozy; the bending stiffness is expressed as:

[0041]

[0042] In the formula,

[0043]

[0044] Where O and C represent the center of the outer corner reinforcement device and the centroid of the stiffening rib unit, respectively; I yw ,I zw and I ywzw They represent the y-axis bending stiffness, z-axis bending stiffness and inertia product of the stiffening rib unit in the coordinate system Ozy respectively; I yo ,I zo and I yOzO They represent the y-axis bending stiffness, z-axis bending stiffness and inertia product of the stiffening rib unit around point O respectively; I yC ,I zC and I yCzCThey respectively represent the y-axis bending stiffness, z-axis bending stiffness and inertia product of the stiffening rib unit around point C; b is the stiffening rib width; h is the stiffening rib height; θ represents the horizontal angle between the stiffening rib unit and the outer corner reinforcement device.

[0045] S13. Obtain the system matrix of the stiffener according to the bending stiffness of the stiffener unit; the system matrix includes a stiffness matrix and a mass matrix; wherein the stiffness matrix and mass matrix of the stiffener can be understood as respectively obtaining the stiffness matrix and mass matrix of all stiffener units, and the stiffness matrix and mass matrix of each stiffener unit are calculated according to their respective bending stiffness. Specifically, the step of obtaining the system matrix of the stiffener according to the bending stiffness of the stiffener unit includes:

[0046] According to the bending stiffness, elastic modulus, shear modulus, length, density, cross-sectional area and cross-sectional torsional inertia moment of each stiffening rib unit, the system matrix of the stiffening rib unit is obtained; the system matrix of the stiffening rib unit is expressed as:

[0047]

[0048] In the formula,

[0049]

[0050] A w =bh

[0051] in, and Respectively represent the stiffness matrix and mass matrix of the stiffening rib unit; I yw and I zw They represent the y-axis bending stiffness and z-axis bending stiffness of the stiffening rib element in the coordinate system Ozy respectively; E w , l w , J w , G w , w and A w They represent the elastic modulus, length, cross-sectional torsional moment of inertia, shear modulus, density and cross-sectional area of ​​the stiffening rib element respectively;

[0052] According to the system matrix of each stiffening rib unit, the system matrix of the stiffening rib is obtained; the system matrix of the stiffening rib is expressed as:

[0053]

[0054] In the formula, K w and M w denote the stiffness matrix and mass matrix of the stiffener respectively; and They represent the stiffness matrix and mass matrix of the e-th stiffening rib unit respectively; nw represents the number of stiffening rib units.

[0055] S14. Obtain the system matrix of the right-angle reinforcement in the outer corner reinforcement device, and obtain the system matrix of the outer corner reinforcement device according to the system matrix of the stiffening rib and the right-angle reinforcement; wherein the system matrix of the right-angle reinforcement 2 is also calculated according to the corresponding bending stiffness, and the corresponding bending stiffness can also be determined by the basic formula of material mechanics. The bending stiffness of the right-angle reinforcement 2 and the stiffening rib 1 are combined to obtain the overall bending stiffness of the outer corner reinforcement device, as well as the overall stiffness matrix and the mass matrix. Specifically, the steps of obtaining the system matrix of the right-angle reinforcement in the outer corner reinforcement device, and obtaining the system matrix of the outer corner reinforcement device according to the system matrix of the stiffening rib and the right-angle reinforcement include:

[0056] According to the material mechanics formula, the bending stiffness of the right-angle reinforcement is obtained; wherein the bending stiffness of the right-angle reinforcement includes the y-axis bending stiffness I yr , z-axis bending stiffness I zr and product of inertia I yrzr The specific calculation method refers to the calculation formula of the stiffening rib unit mentioned above, which will not be repeated here.

[0057] According to the bending stiffness of the right-angle reinforcement, the system matrix of the right-angle reinforcement is obtained by the finite element method; wherein the cross-sectional area A of the right-angle reinforcement is r It is expressed as:

[0058] A r =b y h y +b z h z

[0059] Where b y and b z Respectively represent the length of the right-angle reinforcement along the y-axis and the z-axis; h y and h z Respectively represent the height of the right-angle reinforcement along the y-axis and the z-axis.

[0060] The mass matrix M of the right-angle reinforcement r and the stiffness matrix K r The calculation method of can be found in the calculation method of stiffening rib unit, which will not be described in detail here.

[0061] The mass matrix of the bolt is obtained by the finite element method, and the system matrix of the outer corner reinforcement device is calculated based on the mass matrix of the bolt and the system matrix of the stiffening rib and the right-angle reinforcement member; the system matrix of the outer corner reinforcement device is expressed as:

[0062]

[0063] In the formula, K s and M s They represent the stiffness matrix and mass matrix of the external corner reinforcement device respectively; K w and K r Respectively represent the stiffness matrix of the stiffening rib and the stiffness matrix of the right-angle stiffener; M r 、M w and M b They represent the mass matrix of the right-angle reinforcement, the mass matrix of the stiffener, and the mass matrix of the bolts. There are a large number of bolts on the outer corner reinforcement device, such as Figure 4 As shown, the bolt 5 only produces a mass effect but no stiffness effect on the outer corner reinforcement device 1 itself. Therefore, in order to ensure the accuracy of the system matrix of the outer corner reinforcement device, when calculating the mass matrix of the outer corner reinforcement device, in addition to the stiffening rib 1 and the right-angle reinforcement 2, the mass matrix of the bolt 5 is also considered, and the concentrated mass matrix determined by the finite element method is selected.

[0064] S15. Obtain the system matrix of the first main material member, and obtain the first system force model according to the system matrix of the outer corner reinforcement device and the first main material member; the first main material member includes a plurality of main material member units with the outer corner reinforcement device installed; the first system is composed of the outer corner reinforcement device and the first main material member; wherein the outer corner reinforcement device is connected to the four first main material members 3 around the transmission tower, and the two jointly bear the external load, that is, the outer corner reinforcement device and the first main material member 3 constitute a first system (an outer corner reinforcement device-main material member local combined force system), and establish a corresponding force model. Specifically, the steps of obtaining the system matrix of the first main material member, and obtaining the first system force model according to the system matrix of the outer corner reinforcement device and the first main material member include:

[0065] By using the finite element method, the system matrix of the first main material bar element is obtained;

[0066] According to the system matrix of the first main material member unit, the system matrix of the first main material member is obtained; the system matrix of the first main material member is expressed as:

[0067]

[0068] In the formula, K m,w and M m,w represent the stiffness matrix and mass matrix of the first principal member respectively; and They represent the stiffness matrix and mass matrix of the first principal member element respectively; nw is the number of the first principal member element; where, and They are determined according to the stiffness matrix formula and mass matrix formula of the beam unit in the finite element.

[0069] According to the system matrix of the first main material member and the outer corner reinforcement device, the first system force model is obtained; the first system force model is expressed as:

[0070]

[0071] In the formula, K sm and M sm Respectively represent the stiffness matrix and mass matrix of the first system; K s and M s They represent the stiffness matrix and mass matrix of the external corner reinforcement device respectively; K m,w and M m,w They represent the stiffness matrix and mass matrix of the first principal member respectively; K w and M w They represent the stiffness matrix and mass matrix of the stiffener respectively; K r and M r are the stiffness matrix and mass matrix of the right-angle reinforcement respectively; M b Represents the mass matrix of the bolt.

[0072] S16, obtaining a system matrix of a transmission tower system, and obtaining a second system force model according to the system matrix of the transmission tower system and the first system force model; the second system is composed of the first system and the transmission tower system; the transmission tower system includes a second main material rod, an oblique material and an auxiliary material; the second main material rod includes a plurality of main material rod units without an external corner reinforcement device installed; wherein, after the first system force model is established according to the above steps, other main materials, oblique materials and auxiliary materials in the transmission tower system can be considered, such as Figure 4 The reinforcement fixture 4 inside the reinforcement device is used to establish the stress model of the second system (the entire reinforcement device-tower system), which lays the foundation for the subsequent analysis and research on the wind resistance bearing capacity of the entire system. Specifically, the steps of obtaining the system matrix of the transmission tower system and obtaining the stress model of the second system according to the system matrix of the transmission tower system and the stress model of the first system include:

[0073] By using the finite element method, the system matrices of the second main material member, the diagonal material and the auxiliary material are obtained respectively; wherein the stiffness matrix and the mass matrix of the second main material member, the diagonal material and the auxiliary material are the same as those of the first main material member, and can be determined by using the spatial beam unit formula in the finite element method, and the corresponding mass matrix can use a concentrated mass matrix;

[0074] According to the system matrix of the second main material rod, the oblique material and the auxiliary material, the system matrix of the transmission tower system is obtained; the system matrix of the transmission tower system is expressed as:

[0075]

[0076] In the formula, K T and M T They represent the stiffness matrix and mass matrix of the transmission tower system respectively; and represent the stiffness matrix and mass matrix of the second principal member element respectively; and denote the stiffness matrix and mass matrix of the diagonal element respectively; and They represent the stiffness matrix and mass matrix of the auxiliary material unit respectively; nm, nc and nf represent the number of the second main material bar unit, the number of the diagonal material unit and the number of the auxiliary material unit respectively;

[0077] According to the system matrix of the transmission tower system and the first system force model, the second system force model is obtained; the second system force model is expressed as:

[0078]

[0079] Where K and M represent the stiffness matrix and mass matrix of the second system respectively; K T and M T They represent the stiffness matrix and mass matrix of the transmission tower system respectively; K sm and M sm Respectively represent the stiffness matrix and mass matrix of the first system; K m,w and M m,w They represent the stiffness matrix and mass matrix of the first principal member respectively; K w and M w They represent the stiffness matrix and mass matrix of the stiffener respectively; K r and M r are the stiffness matrix and mass matrix of the right-angle reinforcement respectively; M b Represents the mass matrix of the bolt.

[0080] S17. Establish a second system wind load model, and evaluate the wind-resistant reinforcement effect of the transmission tower based on the second system wind load model and the second system force model. The second system wind load model consists of two parts, including the wind load of the outer corner reinforcement device and the wind load of the transmission tower system, and the wind load of the outer corner reinforcement device consists of two parts: the wind load of the stiffening rib and the wind load of the right-angle reinforcement. After establishing the second system wind load model, construct the force equilibrium equation of the second system under the action of deadweight and wind load, and based on this, perform wind-induced response analysis and evaluation on the reinforcement device-tower system, and evaluate the stability of the reinforcement device. Specifically, the steps of establishing the second system wind load model and evaluating the wind-resistant reinforcement effect of the transmission tower based on the second system wind load model and the second system force model include:

[0081] Calculate the wind load of the outer corner reinforcement device and the wind load of the transmission tower system separately;

[0082] According to the wind load of the outer corner reinforcement device and the wind load of the transmission tower system, the wind load model of the second system is established; the wind load model of the second system is expressed as:

[0083]

[0084] In the formula,

[0085]

[0086] Among them, F w 、F s 、F T and F0 represent the wind loads of the second system, the outer corner reinforcement device, the transmission tower system, and the shielded part of the main material, respectively; A0 is the wind-exposed area vector of the shielded part of the main material; A 0y A is the wind-exposed area vector of the blocked part of the main material along the y-axis; 0z is the wind-receiving area vector of the blocked part of the main material along the coordinate axis z; w0, μ r , μ f , μ s and μ z They represent the basic wind pressure, return period adjustment coefficient, pulsating wind pressure coefficient, wind body shape coefficient and wind pressure height variation coefficient of the area where the transmission tower is located; A s and A T Respectively represent the wind-exposed area vectors of the outer corner reinforcement device and the transmission tower system; A Ty and A Tz They represent the wind-exposed area vectors of the transmission tower system along the y-axis and the z-axis respectively; A my , A cy and A fyRespectively represent the wind-exposed area vectors of the main material, oblique material and auxiliary material along the y direction of the coordinate axis; A mz , A cz and A fz are the wind-exposed area vectors of the main material, oblique material and auxiliary material along the z direction of the coordinate axis; A sy and A sz They represent the wind-exposed areas of the reinforcement device along the y and z directions of the coordinate axis respectively; l w and b represent the length and width of the stiffening rib, respectively; θ represents the horizontal angle between the stiffening rib unit and the outer corner reinforcement device;

[0087] According to the wind load model of the second system, the force balance equation of the second system is established; the force balance equation of the second system is expressed as:

[0088] Kx=(K T +K sm )x=F Tg +F sg +F w

[0089] In the formula,

[0090]

[0091] Where x represents the wind-induced displacement response of the second system; F Tg 、M T and K T They represent the deadweight load, mass matrix and stiffness matrix of the transmission tower system respectively; F sg and M sm represent the deadweight load and mass matrix of the external corner reinforcement device respectively; F w represents the second system wind load vector; K and K sm They represent the stiffness matrices of the second system and the first system respectively; g represents the gravitational acceleration vector;

[0092] The Newton-Raphson method and the incremental method are used to solve the force balance equation of the second system and obtain the wind-induced displacement response of the second system; wherein, when solving the force balance equation of the second system, it is considered that the transmission tower will be significantly deformed or even collapsed under the action of strong winds, showing a relatively obvious geometric nonlinear characteristic, and its response must be calculated using a nonlinear iterative method. Therefore, this embodiment uses a combination of the Newton-Raphson method and the incremental method to solve the force balance equation of the second system (reinforcement device-tower system), and the iterative process uses the displacement convergence criterion. The i+1th wind-induced displacement vector can be expressed as:

[0093] x (i+1) =x (i) +Δx

[0094] In the formula, x (i) and x (i+1) Respectively represent the wind-induced displacement vectors of the second system at the i-th and i+1th times; Δx is the wind-induced displacement increment. According to the displacement of the entire system under the new equilibrium state obtained by solving, the unbalanced force vector of the system can be re-formed. Repeat the above steps until the norm of the obtained system displacement difference meets the set convergence tolerance, and the nonlinear iterative solution process ends:

[0095] ||x (i+1) -x (i) ||2≤ε

[0096] Where ε is a preset displacement convergence tolerance greater than zero, which can be set to 0.01. The above multiple iterations are solved uniformly. After multiple iterations, if all equations reach the convergence condition, the analysis and calculation are completed, and the bearing capacity of the reinforcement device-tower system under strong wind and deadweight can be determined.

[0097] According to the wind-induced displacement response of the second system, the displacement response of the outer corner reinforcement device is obtained; the displacement response of the outer corner reinforcement device is expressed as:

[0098]

[0099] In the formula,

[0100]

[0101] Among them, x and represent the wind-induced displacement response of the second system and the displacement response of the outer corner reinforcement device respectively; T c represents the coordinate transformation matrix, which can be determined according to the finite element method; u1, v1 and w1 represent the translational displacement of the first node of the external corner reinforcement device along the x, y and z axes respectively; θ x1 ,θ y1 and θ z1 They represent the rotational displacement of the first node of the external corner reinforcement device along the x, y and z axes respectively; u2, v2 and w2 represent the translational displacement of the second node of the external corner reinforcement device along the x, y and z axes respectively; θ x2 ,θ y2 and θ z2 They represent the rotational displacement of the second node of the external corner reinforcement device along the x, y and z axes respectively;

[0102] According to the displacement response of the outer corner reinforcement device, the internal force vector of the outer corner reinforcement device is obtained; the internal force vector of the outer corner reinforcement device is expressed as:

[0103]

[0104] In the formula,

[0105]

[0106] in, and K s They represent the internal force vector and stiffness matrix of the external corner reinforcement device respectively; N is the axial force of the reinforcement device unit; S y and S z They represent the shear forces of the external corner reinforcement device along two orthogonal directions; M y and M z They represent the bending moments of the external corner reinforcement device along two orthogonal directions respectively; T represents the torque of the external corner reinforcement device;

[0107] According to the internal force vector of the outer corner reinforcement device, it is judged whether the outer corner reinforcement device satisfies the stability condition in the y-axis direction and the stability condition in the z-axis direction at the same time; the stability condition in the y-axis direction is expressed as:

[0108]

[0109] In the formula,

[0110]

[0111] A s =bh+b y h y +b z h z

[0112] in, represents the axial compressive stability coefficient along the y-axis; represents the overall stability coefficient of the bending member along the z axis; N represents the axial force acting on the external corner reinforcement device; M y and M z Respectively represent the bending moment along the y-axis and along the z-axis; N' Ey represents the equivalent Euler critical force of the external corner reinforcement along the y-axis; E w represents the elastic modulus of the stiffening rib element; W y and W z Respectively represent the section modulus along the y-axis and z-axis; β tz and β my They represent the equivalent bending moment coefficients for out-of-plane stability calculation along the z-axis and the y-axis respectively; y represents the cross-sectional plastic development coefficient along the y-axis corresponding to the cross-sectional modulus; η represents the cross-sectional influence coefficient of the external corner reinforcement device; f represents the yield stress of the external corner reinforcement device; λ y represents the slenderness ratio of the external corner reinforcement device around the y-axis; l 0y It represents the calculated length around the y-axis when the external corner reinforcement device is unstable; I ys represents the y-axis bending stiffness of the external corner reinforcement device; b y and bz Respectively represent the length of the right-angle reinforcement along the y-axis and the z-axis; h y and h z Respectively represent the length of the right-angle reinforcement along the y-axis and the z-axis; A s and A represent the cross-sectional area and gross cross-sectional area of ​​the outer corner reinforcement, respectively.

[0113] The stability condition in the z-axis direction is expressed as:

[0114]

[0115] In the formula,

[0116]

[0117] A s =bh+b y h y +b z h z

[0118] in, It represents the axial compressive stability coefficient along the z-axis; represents the overall stability coefficient of the bending member along the y-axis; N represents the axial force acting on the external corner reinforcement device; M y and M z Respectively represent the bending moment along the y-axis and along the z-axis; N' Ez represents the equivalent Euler critical force of the outer corner reinforcement along the z-axis; E w represents the elastic modulus of the stiffening rib element; W y and W z Respectively represent the section modulus along the y-axis and z-axis; β mz and β ty They represent the equivalent bending moment coefficients for out-of-plane stability calculation along the z-axis and the y-axis respectively; z represents the cross-sectional plastic development coefficient along the z-axis corresponding to the cross-sectional modulus; η represents the cross-sectional influence coefficient of the external corner reinforcement device; f represents the yield stress of the external corner reinforcement device; λ z represents the slenderness ratio of the external corner reinforcement device around the z-axis; l 0z It represents the calculated length around the z-axis when the external corner reinforcement device is unstable; I zs represents the z-axis bending stiffness of the external corner reinforcement; b y and b z Respectively represent the length of the right-angle reinforcement along the y-axis and the z-axis; h y and h z They represent the length of the right-angle reinforcement along the y-axis and the z-axis respectively; As and A represent the cross-sectional area and the gross cross-sectional area of ​​the outer corner reinforcement respectively.

[0119] The embodiment of the present application is based on considerations of the influence of the geometric shape of the reinforcement device on the wind load, the influence of the stiffening rib angle on the wind-receiving area and wind load of the reinforcement device, and the influence of the wind-receiving area of ​​the main material blocked by the reinforcement device on the wind load of the tower system. A mechanical model of the stiffening rib, a mechanical model of the outer corner reinforcement device-main material, and a mechanical model of the outer corner reinforcement device-transmission tower system and corresponding wind load models, force balance equations, wind-induced response analysis methods, and stability evaluation methods are established in sequence. The embodiment of the present application can quantitatively and accurately evaluate the wind-resistant reinforcement effect of the transmission tower and the stability of the reinforcement device. The embodiment of the present application not only has the advantages of a wide range of applications and high analysis accuracy, but also can effectively improve the analysis and evaluation level of the wind-resistant reinforcement effect of the transmission tower and the stability of the reinforcement device, thereby improving the operation and maintenance level of the transmission tower in response to strong wind disasters.

[0120] In order to further verify the actual application effect of the wind-resistant reinforcement effect evaluation method of the transmission tower of the present invention, the following Figure 5 The transmission tower with an external corner reinforcement device is analyzed as shown. The transmission tower is 40m high and has 5 node layers. The diagonal rods are made of Q235 steel with a yield stress of 235MPa, and the main material is Q345 steel with a yield stress of 345MPa. The elastic modulus of the steel is 2.01×1011N / m2 and the density is 7800kg / m3. Figure 6 The schematic diagram of the transmission tower segmentation is given. The entire tower is divided into 5 sections from top to bottom: the tower head, 3 sections of the tower body and the tower legs. The main material rod numbers of each section of the tower body are shown in Table 1.

[0121] Table 1 Main material bar numbers of each section of the tower body

[0122] Model segment number Main material number 2 875～906 3 1～32 4 33～64 5 65～92

[0123] The above S11-S17 methods can be used to determine the wind-induced response of the reinforcement device and the transmission tower system and evaluate the wind-resistant reinforcement effect, as well as analyze and evaluate the stress stability of the reinforcement device under wind load, and obtain the analysis results shown in Table 2-5.

[0124] Table 2 Comparison of reinforcement effects of typical main material members

[0125] Rod number Rod specifications (length mm × thickness mm) Stress before reinforcement (MPa) Stress after reinforcement (MPa) Stress change rate 74 125×10.0 181.02 82.48 -54.43％ 88 125×8.0 211.68 77.76 -63.26％ 43 110×8.0 195.32 71.21 -63.54％ 60 110×8.0 218.44 79.8 -63.46％ 12 100×8.0 167.77 61.77 -63.18％ 28 100×8.0 191.7 69.86 -63.55％ 878 90×7.0 129.62 98.97 -23.64％ 890 90×7.0 151.43 113.97 -24.73％ 898 90×7.0 169.48 125.98 -25.66％ 906 90×7.0 186.77 137.87 -26.18％

[0126] Table 3 Comparison of reinforcement effects of typical diagonal members

[0127] Rod number Rod specifications (length mm × thickness mm) Stress before reinforcement (MPa) Stress after reinforcement (MPa) Stress change rate 721 63×5.0 92.4 72.41 -21.63％ 590 56×5.0 62.88 46.41 -26.19％ 555 56×5.0 59.5 42.84 -28.01％ 527 56×5.0 54.7 38.32 -29.94％ 491 56×5.0 49.62 33.54 -32.40％ 475 56×5.0 56.86 38.45 -32.37％ 448 56×5.0 37.21 24.76 -33.45％ 444 56×5.0 42.68 29.34 -31.25％ 440 56×5.0 42.79 28.48 -33.44％ 436 56×5.0 49.62 34.11 -31.25％

[0128] Table 4 Comparison of reinforcement effects of typical cross-partition members

[0129] Rod number Rod specifications (length mm × thickness mm) Stress before reinforcement (MPa) Stress after reinforcement (MPa) Stress change rate 710 63×5.0 43.4 34.54 -20.41％ 561 56×5.0 0.59 0.46 -22.03％ 750 70×5.0 16.07 15.1 -6.04％

[0130] Table 5 Comparison of reinforcement effects of typical tower head members

[0131] Rod number Rod specifications (length mm × thickness mm) Stress before reinforcement (MPa) Stress after reinforcement (MPa) Stress change rate 824 80×6.0 74.37 54.21 -27.10％ 840 80×6.0 101.65 81.08 -20.23％ 806 75×5.0 80.83 62.61 -22.54％ 762 75×5.0 11.01 10.66 -3.178％ 774 75×5.0 52.31 39.11 -25.23％ 702 63×5.0 98.81 73.42 -25.69％ 678 63×5.0 73.53 57.11 -22.33％ 411 56×5.0 7.37 6.83 -7.327％ 638 56×5.0 43.23 30.82 -28.70％ 178 40×3.0 2.8 2.5 -10.71％ 910 90×7.0 2.34 2.24 -4.273％

[0132] As shown in the data in Table 2, installing the external corner reinforcement device can effectively reduce the stress of the main material members. The stress of all main material members has been reduced, and the degree of reduction varies. The maximum stress reduction can reach more than 60%, and the minimum is more than 20%. The comparison results given in Table 3-4 show that after installing the reinforcement device, the stress of the diagonal material, transverse diaphragm and tower head members has also been effectively reduced, but the wind resistance reinforcement effect is not as significant as that of the main material members.

[0133] Based on the above wind-resistant reinforcement effects, it can be seen that: (1) installing an external corner reinforcement device can effectively improve the bearing capacity of the transmission tower and improve the wind resistance of the tower; (2) installing an external corner reinforcement device can reduce the wind-induced internal force of various rods in the transmission tower; the reinforcement effect of the reinforcement device on the main rod is significantly better than that on other rods, the main reason is that the reinforcement device is installed on the main rod; (3) the evaluation method and system of the external corner reinforcement device on the wind-resistant reinforcement effect of the transmission tower proposed in the present invention can accurately consider the angle problem of the stiffening ribs , which can establish the wind-exposed area model and wind load model of the reinforcement device that change with wind direction, greatly improve the accuracy of the wind load model, and significantly improve the analysis accuracy; (4) Through the rod stress of the transmission tower before and after reinforcement, it can be found that the evaluation method of the outer corner reinforcement device proposed in the present invention on the wind-resistant reinforcement effect of the transmission tower has the advantages of clear concept and accurate analysis and calculation; (5) The analysis method and system are applicable and are suitable for the analysis and calculation of the wind-resistant reinforcement effect of transmission towers of various types, different heights and different physical parameters.

[0134] It should be noted that although the steps in the above flowchart are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders.

[0135] In one embodiment, Figure 6 As shown, a system for evaluating the wind-resistant reinforcement effect of a transmission tower is provided, and the system comprises:

[0136] Data acquisition module 1, used to obtain node information and physical parameters of each stiffening rib unit in the outer corner reinforcement device; the node information includes node coordinates and stiffening rib geometric shape parameters; the physical parameters include elastic modulus, shear modulus and density;

[0137] The first calculation module 2 is used to obtain the bending stiffness of the stiffening rib unit according to the node information and physical parameters of each stiffening rib unit; the bending stiffness includes the y-axis bending stiffness, the z-axis bending stiffness and the inertia product;

[0138] The second calculation module 3 is used to obtain the system matrix of the stiffening rib according to the bending stiffness of the stiffening rib unit; the system matrix includes a stiffness matrix and a mass matrix;

[0139] The third calculation module 4 is used to obtain the system matrix of the right-angle reinforcement member in the outer corner reinforcement device, and obtain the system matrix of the outer corner reinforcement device according to the system matrix of the stiffening rib and the right-angle reinforcement member;

[0140] The first modeling module 5 is used to obtain the system matrix of the first main material member, and obtain the first system force model according to the system matrix of the outer corner reinforcement device and the first main material member; the first main material member includes a plurality of main material member units installed with the outer corner reinforcement device; the first system is composed of the outer corner reinforcement device and the first main material member;

[0141] The second modeling module 6 is used to obtain the system matrix of the transmission tower system, and obtain the second system force model according to the system matrix of the transmission tower system and the first system force model; the second system is composed of the first system and the transmission tower system; the transmission tower system includes a second main material rod, an oblique material and an auxiliary material; the second main material rod includes a plurality of main material rod units without an external corner reinforcement device installed;

[0142] The effect evaluation module 7 is used to establish a second system wind load model, and evaluate the wind-resistant reinforcement effect of the transmission tower according to the second system wind load model and the second system force model.

[0143] It should be noted that the specific limitations of the transmission tower wind-resistant reinforcement effect evaluation system can be found in the limitations of the transmission tower wind-resistant reinforcement effect evaluation method mentioned above, which will not be repeated here. Each module in the above-mentioned transmission tower wind-resistant reinforcement effect evaluation system can be implemented in whole or in part through software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0144] Figure 7 FIG. 1 shows an internal structure diagram of a computer device in an embodiment, and the computer device may specifically be a terminal or a server. Figure 7As shown, the computer device includes a processor, a memory, a network interface, a display and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for evaluating the wind-resistant reinforcement effect of a transmission tower is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse, etc.

[0145] It can be understood by those skilled in the art that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the present application scheme, and does not constitute a limitation on the computer device to which the present application scheme is applied. The specific computing device may include more or fewer components than those shown in the figure, or combine certain components, or have the same component arrangement.

[0146] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the above method are implemented when the processor executes the computer program.

[0147] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0148] In summary, an embodiment of the present invention provides a method, system, computer device and storage medium for evaluating the wind-resistant reinforcement effect of a transmission tower. The method for evaluating the wind-resistant reinforcement effect of a transmission tower obtains node information and physical parameters of each stiffening rib unit in an external angle reinforcement device, obtains the bending stiffness of the stiffening rib unit according to the node information and physical parameters, and then accumulates the system matrix of the stiffening ribs, and obtains the system matrix of the external angle reinforcement device in combination with the obtained system matrix of the right-angle reinforcement member in the external angle reinforcement device, and obtains the first system force model according to the obtained system matrix of the first main material rod and the system matrix of the external angle reinforcement device, and obtains the second system force model according to the obtained system matrix of the transmission tower system and the first system force model. A model is developed, and a technical solution is established to evaluate the wind-resistant reinforcement effect of transmission towers by combining a second system wind load model with a second system force model. The wind load model, force balance equation and wind-induced response analysis method are established based on the influence of the geometric shape of the reinforcement device on the wind load, the influence of the stiffening rib angle on the wind-receiving area and wind load of the reinforcement device, and the influence of the wind-receiving area of ​​the main material blocked by the reinforcement device on the wind load of the tower system. The wind-resistant reinforcement effect of the transmission tower and the stability of the reinforcement device can be quantitatively and accurately evaluated. The method not only has the advantages of wide application range and high analysis accuracy, but also can effectively improve the analysis and evaluation level of the wind-resistant reinforcement effect of the transmission tower and the stability of the reinforcement device, thereby improving the operation and maintenance level of the transmission tower in response to strong wind disasters.

[0149] Each embodiment in this specification is described in a progressive manner, and the same or similar parts of each embodiment can be directly referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. It should be noted that the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0150] The above-mentioned embodiments only express several preferred implementation modes of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in the technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be regarded as the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be based on the protection scope of the claims.

Claims

1. A method for evaluating the wind-resistant reinforcement effect of a transmission tower, characterized in that: The method comprises the following steps: Obtaining node information and physical parameters of each stiffening rib unit in the outer corner reinforcement device; the node information includes node coordinates and stiffening rib geometric shape parameters; the physical parameters include elastic modulus, shear modulus and density; According to the node information and physical parameters of each stiffening rib unit, the bending stiffness of the stiffening rib unit is obtained; the bending stiffness includes the y-axis bending stiffness, the z-axis bending stiffness and the inertia product; According to the bending stiffness of the stiffening rib unit, a system matrix of the stiffening rib is obtained; the system matrix includes a stiffness matrix and a mass matrix; Obtaining a system matrix of the right-angle reinforcement member in the outer corner reinforcement device, and obtaining a system matrix of the outer corner reinforcement device according to the system matrix of the stiffening rib and the right-angle reinforcement member; Obtaining a system matrix of a first main member, and obtaining a first system force model according to the system matrix of the outer corner reinforcement device and the first main member; the first main member includes a plurality of main member units on which the outer corner reinforcement device is installed; the first system is composed of the outer corner reinforcement device and the first main member; Obtaining a system matrix of a transmission tower system, and obtaining a second system force model according to the system matrix of the transmission tower system and the first system force model; the second system is composed of the first system and the transmission tower system; the transmission tower system includes a second main material rod, an oblique material and an auxiliary material; the second main material rod includes a plurality of main material rod units without an external corner reinforcement device installed; Establishing a second system wind load model, and evaluating the wind-resistant reinforcement effect of the transmission tower according to the second system wind load model and the second system force model; The step of obtaining the system matrix of the right-angle reinforcement member in the outer corner reinforcement device and obtaining the system matrix of the outer corner reinforcement device according to the system matrix of the stiffening rib and the right-angle reinforcement member comprises: According to the material mechanics formula, the bending stiffness of the right-angle reinforcement is obtained; According to the bending stiffness of the right-angle reinforcement, a system matrix of the right-angle reinforcement is obtained by a finite element method; The mass matrix of the bolt is obtained by the finite element method, and the system matrix of the outer corner reinforcement device is calculated based on the mass matrix of the bolt and the system matrix of the stiffening rib and the right-angle reinforcement member; the system matrix of the outer corner reinforcement device is expressed as: In the formula, K s and M s They represent the stiffness matrix and mass matrix of the external corner reinforcement device respectively; K w and K r Respectively represent the stiffness matrix of the stiffening rib and the stiffness matrix of the right-angle stiffener; M r 、M w and M b denote the mass matrix of the right-angle stiffener, the mass matrix of the stiffener, and the mass matrix of the bolt respectively; The steps of establishing the second system wind load model and evaluating the wind-resistant reinforcement effect of the transmission tower according to the second system wind load model and the second system force model include: Calculate the wind load of the outer corner reinforcement device and the wind load of the transmission tower system separately; According to the wind load of the outer corner reinforcement device and the wind load of the transmission tower system, the wind load model of the second system is established; the wind load model of the second system is expressed as: In the formula, Among them, F w 、F s 、F T and F0 represent the wind loads of the second system, the outer corner reinforcement device, the transmission tower system, and the shielded part of the main material, respectively; A0 is the wind-exposed area vector of the shielded part of the main material; A 0y A is the wind-exposed area vector of the blocked part of the main material along the y-axis; 0z is the wind-receiving area vector of the blocked part of the main material along the coordinate axis z; w0, μ r , μ f , μ s and μ z They represent the basic wind pressure, return period adjustment coefficient, pulsating wind pressure coefficient, wind body shape coefficient and wind pressure height variation coefficient of the area where the transmission tower is located; A s and A T Respectively represent the wind-exposed area vectors of the outer corner reinforcement device and the transmission tower system; A Ty and A Tz They represent the wind-exposed area vectors of the transmission tower system along the y-axis and the z-axis respectively; A my , A cy and A fy Respectively represent the wind-exposed area vectors of the main material, oblique material and auxiliary material along the y direction of the coordinate axis; A mz , A cz and A fz are the wind-exposed area vectors of the main material, oblique material and auxiliary material along the z direction of the coordinate axis; A sy and A sz They represent the wind-exposed areas of the reinforcement device along the y and z directions of the coordinate axis respectively; l w and b represent the length and width of the stiffening rib, respectively; θ represents the horizontal angle between the stiffening rib unit and the outer corner reinforcement device; According to the wind load model of the second system, the force balance equation of the second system is established; the force balance equation of the second system is expressed as: Kx=(K T +K sm )x=F Tg +F sg +F w In the formula, Where x represents the wind-induced displacement response of the second system; F Tg 、M T and K T They represent the deadweight load, mass matrix and stiffness matrix of the transmission tower system respectively; F sg and M sm represent the deadweight load and mass matrix of the external corner reinforcement device respectively; F w represents the second system wind load vector; K and K sm They represent the stiffness matrices of the second system and the first system respectively; g represents the gravitational acceleration vector; The Newton-Raphson method and the incremental method are used to solve the force equilibrium equation of the second system and obtain the wind-induced displacement response of the second system; According to the wind-induced displacement response of the second system, the displacement response of the outer corner reinforcement device is obtained; the displacement response of the outer corner reinforcement device is expressed as: In the formula, Among them, x and represent the wind-induced displacement response of the second system and the displacement response of the outer corner reinforcement device respectively; T c represents the coordinate transformation matrix; u1, v1 and w1 represent the translational displacement of the first node of the external corner reinforcement device along the x, y and z axes respectively; θ x1 ,θ y1 and θ z1 They represent the rotational displacement of the first node of the external corner reinforcement device along the x, y and z axes respectively; u2, v2 and w2 represent the translational displacement of the second node of the external corner reinforcement device along the x, y and z axes respectively; θ x2 ,θ y2 and θ z2 They represent the rotational displacement of the second node of the external corner reinforcement device along the x, y and z axes respectively; According to the displacement response of the outer corner reinforcement device, the internal force vector of the outer corner reinforcement device is obtained; the internal force vector of the outer corner reinforcement device is expressed as: In the formula, in, and K s They represent the internal force vector and stiffness matrix of the external corner reinforcement device respectively; N is the axial force of the reinforcement device unit; S y and S z They represent the shear forces of the external corner reinforcement device along two orthogonal directions; M y and M z They represent the bending moments of the external corner reinforcement device along two orthogonal directions respectively; T represents the torque of the external corner reinforcement device; According to the internal force vector of the outer corner reinforcement device, respectively judging whether the outer corner reinforcement device satisfies the stability condition in the y-axis direction and the stability condition in the z-axis direction; The stability condition in the y-axis direction is expressed as: In the formula, A s =bh+b y h y +b z h z in, represents the axial compressive stability coefficient along the y-axis; represents the overall stability coefficient of the bending member along the z axis; N represents the axial force acting on the external corner reinforcement device; M y and M z Respectively represent the bending moment along the y-axis and along the z-axis; N' Ey represents the equivalent Euler critical force of the external corner reinforcement along the y-axis; E w represents the elastic modulus of the stiffening rib element; W y and W z Respectively represent the section modulus along the y-axis and z-axis; β tz and β my They represent the equivalent bending moment coefficients for out-of-plane stability calculation along the z-axis and the y-axis respectively; y represents the cross-sectional plastic development coefficient along the y-axis corresponding to the cross-sectional modulus; η represents the cross-sectional influence coefficient of the external corner reinforcement device; f represents the yield stress of the external corner reinforcement device; λ y represents the slenderness ratio of the external corner reinforcement device around the y-axis; l 0y It represents the calculated length around the y-axis when the external corner reinforcement device is unstable; I ys represents the y-axis bending stiffness of the external corner reinforcement device; b y and b z Respectively represent the length of the right-angle reinforcement along the y-axis and the z-axis; h y and h z denote the lengths of the right-angle reinforcement along the y-axis and the z-axis, respectively; As and A denote the cross-sectional area and gross cross-sectional area of ​​the outer corner reinforcement, respectively; The stability condition in the z-axis direction is expressed as: In the formula, A s =bh+b y h y +b z h z in, It represents the axial compressive stability coefficient along the z-axis; represents the overall stability coefficient of the bending member along the y-axis; N represents the axial force acting on the external corner reinforcement device; M y and M z Respectively represent the bending moment along the y-axis and along the z-axis; N' Ez represents the equivalent Euler critical force of the outer corner reinforcement along the z-axis; E w represents the elastic modulus of the stiffening rib element; W y and W z Respectively represent the section modulus along the y-axis and z-axis; β mz and β ty They represent the equivalent bending moment coefficients for out-of-plane stability calculation along the z-axis and the y-axis respectively; z represents the cross-sectional plastic development coefficient along the z-axis corresponding to the cross-sectional modulus; η represents the cross-sectional influence coefficient of the external corner reinforcement device; f represents the yield stress of the external corner reinforcement device; λ z represents the slenderness ratio of the external corner reinforcement device around the z-axis; l 0z It represents the calculated length around the z-axis when the external corner reinforcement device is unstable; I zs represents the z-axis bending stiffness of the external corner reinforcement; b y and b z Respectively represent the length of the right-angle reinforcement along the y-axis and the z-axis; h y and h z They represent the length of the right-angle reinforcement along the y-axis and the z-axis respectively; As and A represent the cross-sectional area and the gross cross-sectional area of ​​the outer corner reinforcement respectively.

2. The method for evaluating the wind-resistant reinforcement effect of a transmission tower according to claim 1, characterized in that: The step of obtaining the bending stiffness of the stiffening rib unit according to the node information and physical parameters of each stiffening rib unit comprises: According to the node coordinates and the stiffening rib geometric shape parameters, the first bending stiffness of the corresponding stiffening rib unit is obtained; the first bending stiffness of the stiffening rib unit is the bending stiffness of the stiffening rib unit around the centroid; According to the first bending stiffness of the stiffening rib unit, a second bending stiffness of the stiffening rib unit is obtained; the second bending stiffness of the stiffening rib unit is the bending stiffness of the stiffening rib unit around the center of the outer corner reinforcement device; According to the second bending stiffness of the stiffening rib unit, the bending stiffness of the stiffening rib unit is obtained; the bending stiffness of the stiffening rib unit is the bending stiffness of the stiffening rib unit around the coordinate system Ozy; the bending stiffness is expressed as: In the formula, Where O and C represent the center of the outer corner reinforcement device and the centroid of the stiffening rib unit, respectively; I yw ,I zw and I ywzw They represent the y-axis bending stiffness, z-axis bending stiffness and inertia product of the stiffening rib unit in the coordinate system Ozy respectively; I yo ,I zo and I yOzO They represent the y-axis bending stiffness, z-axis bending stiffness and inertia product of the stiffening rib unit around point O respectively; I yC ,I zC and I yCzC They respectively represent the y-axis bending stiffness, z-axis bending stiffness and inertia product of the stiffening rib unit around point C; b is the stiffening rib width; h is the stiffening rib height; θ represents the horizontal angle between the stiffening rib unit and the outer corner reinforcement device.

3. The method for evaluating the wind-resistant reinforcement effect of a transmission tower according to claim 1, characterized in that: The step of obtaining the system matrix of the stiffening rib according to the bending stiffness of the stiffening rib unit comprises: According to the bending stiffness, elastic modulus, shear modulus, length, density, cross-sectional area and cross-sectional torsional inertia moment of each stiffening rib unit, the system matrix of the stiffening rib unit is obtained; the system matrix of the stiffening rib unit is expressed as: In the formula, A=bh in, and Respectively represent the stiffness matrix and mass matrix of the stiffening rib unit; I yw and I zw They represent the y-axis bending stiffness and z-axis bending stiffness of the stiffening rib element in the coordinate system Ozy respectively; E w , l w , J w , G w , w and A w They represent the elastic modulus, length, cross-sectional torsional moment of inertia, shear modulus, density and cross-sectional area of ​​the stiffening rib element respectively; According to the system matrix of each stiffening rib unit, the system matrix of the stiffening rib is obtained; the system matrix of the stiffening rib is expressed as: In the formula, K w and M w denote the stiffness matrix and mass matrix of the stiffener respectively; and They represent the stiffness matrix and mass matrix of the e-th stiffening rib unit respectively; nw represents the number of stiffening rib units.

4. The method for evaluating the wind-resistant reinforcement effect of a transmission tower according to claim 1, characterized in that: The step of obtaining the system matrix of the first main material member and obtaining the first system force model according to the system matrix of the outer corner reinforcement device and the first main material member comprises: By using the finite element method, the system matrix of the first main material bar element is obtained; According to the system matrix of the first main material member unit, the system matrix of the first main material member is obtained; the system matrix of the first main material member is expressed as: In the formula, K m,w and M m,w represent the stiffness matrix and mass matrix of the first principal member respectively; and They represent the stiffness matrix and mass matrix of the first principal material bar element respectively; nw is the number of the first principal material bar element; According to the system matrix of the first main material member and the outer corner reinforcement device, the first system force model is obtained; the first system force model is expressed as: In the formula, K sm and M sm Respectively represent the stiffness matrix and mass matrix of the first system; K s and M s They represent the stiffness matrix and mass matrix of the external corner reinforcement device respectively; K m,w and M m,w They represent the stiffness matrix and mass matrix of the first principal member respectively; K w and M w They represent the stiffness matrix and mass matrix of the stiffener respectively; K r and M r are the stiffness matrix and mass matrix of the right-angle reinforcement respectively; M b Represents the mass matrix of the bolt.

5. The method for evaluating the wind-resistant reinforcement effect of a transmission tower according to claim 1, characterized in that: The step of obtaining a system matrix of a transmission tower system and obtaining a second system force model according to the system matrix of the transmission tower system and the first system force model comprises: By using the finite element method, the system matrices of the second main material bar, the oblique material and the auxiliary material are obtained respectively; According to the system matrix of the second main material rod, the oblique material and the auxiliary material, the system matrix of the transmission tower system is obtained; the system matrix of the transmission tower system is expressed as: In the formula, K T and M T They represent the stiffness matrix and mass matrix of the transmission tower system respectively; and represent the stiffness matrix and mass matrix of the second principal member element respectively; and denote the stiffness matrix and mass matrix of the diagonal element respectively; and They represent the stiffness matrix and mass matrix of the auxiliary material unit respectively; nm, nc and nf represent the number of the second main material bar unit, the number of the diagonal material unit and the number of the auxiliary material unit respectively; According to the system matrix of the transmission tower system and the first system force model, the second system force model is obtained; the second system force model is expressed as: Where K and M represent the stiffness matrix and mass matrix of the second system respectively; K T and M T They represent the stiffness matrix and mass matrix of the transmission tower system respectively; K sm and M sm Respectively represent the stiffness matrix and mass matrix of the first system; K mw and M mw They represent the stiffness matrix and mass matrix of the first principal member respectively; K w and M w They represent the stiffness matrix and mass matrix of the stiffener respectively; K r and M r are the stiffness matrix and mass matrix of the right-angle reinforcement respectively; M b Represents the mass matrix of the bolt.

6. A transmission tower wind resistance reinforcement effect evaluation system, characterized in that: The system comprises: A data acquisition module, used to acquire node information and physical parameters of each stiffening rib unit in the outer corner reinforcement device; the node information includes node coordinates and stiffening rib geometric shape parameters; the physical parameters include elastic modulus, shear modulus and density; The first calculation module is used to obtain the bending stiffness of the stiffening rib unit according to the node information and physical parameters of each stiffening rib unit; the bending stiffness includes the y-axis bending stiffness, the z-axis bending stiffness and the inertia product; The second calculation module is used to obtain a system matrix of the stiffening rib according to the bending stiffness of the stiffening rib unit; the system matrix includes a stiffness matrix and a mass matrix; A third calculation module is used to obtain a system matrix of the right-angle reinforcement member in the outer corner reinforcement device, and obtain a system matrix of the outer corner reinforcement device according to the system matrix of the stiffening rib and the right-angle reinforcement member; A first modeling module is used to obtain a system matrix of a first main material member, and obtain a first system force model according to the system matrix of the outer corner reinforcement device and the first main material member; the first main material member includes a plurality of main material member units on which the outer corner reinforcement device is installed; the first system is composed of the outer corner reinforcement device and the first main material member; A second modeling module is used to obtain a system matrix of a transmission tower system, and obtain a second system force model according to the system matrix of the transmission tower system and the first system force model; the second system is composed of the first system and the transmission tower system; the transmission tower system includes a second main material rod, an oblique material and an auxiliary material; the second main material rod includes a plurality of main material rod units without an external corner reinforcement device installed; An effect evaluation module, used to establish a second system wind load model, and evaluate the wind-resistant reinforcement effect of the transmission tower according to the second system wind load model and the second system force model; The step of obtaining the system matrix of the right-angle reinforcement member in the outer corner reinforcement device and obtaining the system matrix of the outer corner reinforcement device according to the system matrix of the stiffening rib and the right-angle reinforcement member comprises: According to the material mechanics formula, the bending stiffness of the right-angle reinforcement is obtained; According to the bending stiffness of the right-angle reinforcement, a system matrix of the right-angle reinforcement is obtained by a finite element method; The mass matrix of the bolt is obtained by the finite element method, and the system matrix of the outer corner reinforcement device is calculated based on the mass matrix of the bolt and the system matrix of the stiffening rib and the right-angle reinforcement member; the system matrix of the outer corner reinforcement device is expressed as: In the formula, K s and M s They represent the stiffness matrix and mass matrix of the external corner reinforcement device respectively; K w and K r Respectively represent the stiffness matrix of the stiffening rib and the stiffness matrix of the right-angle stiffener; M r 、M w and M b denote the mass matrix of the right-angle stiffener, the mass matrix of the stiffener, and the mass matrix of the bolt respectively; The steps of establishing the second system wind load model and evaluating the wind-resistant reinforcement effect of the transmission tower according to the second system wind load model and the second system force model include: Calculate the wind load of the outer corner reinforcement device and the wind load of the transmission tower system separately; According to the wind load of the outer corner reinforcement device and the wind load of the transmission tower system, the wind load model of the second system is established; the wind load model of the second system is expressed as: In the formula, Among them, F w 、F s 、F T and F0 represent the wind loads of the second system, the outer corner reinforcement device, the transmission tower system, and the shielded part of the main material, respectively; A0 is the wind-exposed area vector of the shielded part of the main material; A 0y A is the wind-exposed area vector of the blocked part of the main material along the y-axis; 0z is the wind-receiving area vector of the blocked part of the main material along the coordinate axis z; w0, μ r , μ f , μ s and μ z They represent the basic wind pressure, return period adjustment coefficient, pulsating wind pressure coefficient, wind body shape coefficient and wind pressure height variation coefficient of the area where the transmission tower is located; A s and A T Respectively represent the wind-exposed area vectors of the outer corner reinforcement device and the transmission tower system; A Ty and A Tz They represent the wind-exposed area vectors of the transmission tower system along the y-axis and the z-axis respectively; A my , A cy and A fy Respectively represent the wind-exposed area vectors of the main material, oblique material and auxiliary material along the y direction of the coordinate axis; A mz , A cz and A fz are the wind-exposed area vectors of the main material, oblique material and auxiliary material along the z direction of the coordinate axis; A sy and A sz They represent the wind-exposed areas of the reinforcement device along the y and z directions of the coordinate axis respectively; l w and b represent the length and width of the stiffening rib, respectively; θ represents the horizontal angle between the stiffening rib unit and the outer corner reinforcement device; According to the wind load model of the second system, the force balance equation of the second system is established; the force balance equation of the second system is expressed as: Kx=(K T +K sm )x=F Tg +F sg +F w In the formula, Where x represents the wind-induced displacement response of the second system; F Tg 、M T and K T They represent the deadweight load, mass matrix and stiffness matrix of the transmission tower system respectively; F sg and M sm represent the deadweight load and mass matrix of the external corner reinforcement device respectively; F w represents the second system wind load vector; K and K sm denote the stiffness matrices of the second system and the first system respectively; g denotes the gravitational acceleration vector; The Newton-Raphson method and the incremental method are used to solve the force equilibrium equation of the second system and obtain the wind-induced displacement response of the second system; According to the wind-induced displacement response of the second system, the displacement response of the outer corner reinforcement device is obtained; the displacement response of the outer corner reinforcement device is expressed as: In the formula, Among them, x and represent the wind-induced displacement response of the second system and the displacement response of the outer corner reinforcement device respectively; T c represents the coordinate transformation matrix; u1, v1 and w1 represent the translational displacement of the first node of the external corner reinforcement device along the x, y and z axes respectively; θ x1 ,θ y1 and θ z1 They represent the rotational displacement of the first node of the external corner reinforcement device along the x, y and z axes respectively; u2, v2 and w2 represent the translational displacement of the second node of the external corner reinforcement device along the x, y and z axes respectively; θ x2 ,θ y2 and θ z2 They represent the rotational displacement of the second node of the external corner reinforcement device along the x, y and z axes respectively; According to the displacement response of the outer corner reinforcement device, the internal force vector of the outer corner reinforcement device is obtained; the internal force vector of the outer corner reinforcement device is expressed as: In the formula, in, and K s They represent the internal force vector and stiffness matrix of the external corner reinforcement device respectively; N is the axial force of the reinforcement device unit; S y and S z They represent the shear forces of the external corner reinforcement device along two orthogonal directions; M y and M z They represent the bending moments of the external corner reinforcement device along two orthogonal directions respectively; T represents the torque of the external corner reinforcement device; According to the internal force vector of the outer corner reinforcement device, respectively judging whether the outer corner reinforcement device satisfies the stability condition in the y-axis direction and the stability condition in the z-axis direction; The stability condition in the y-axis direction is expressed as: In the formula, A s =bh+b y h y +b z h z in, represents the axial compressive stability coefficient along the y-axis; represents the overall stability coefficient of the bending member along the z axis; N represents the axial force acting on the external corner reinforcement device; M y and M z Respectively represent the bending moment along the y-axis and along the z-axis; N' Ey represents the equivalent Euler critical force of the external corner reinforcement along the y-axis; E w represents the elastic modulus of the stiffening rib element; W y and W z Respectively represent the section modulus along the y-axis and z-axis; β tz and β my They represent the equivalent bending moment coefficients for out-of-plane stability calculations along the z-axis and the y-axis respectively; y represents the cross-sectional plastic development coefficient along the y-axis corresponding to the cross-sectional modulus; η represents the cross-sectional influence coefficient of the external corner reinforcement device; f represents the yield stress of the external corner reinforcement device; λ y represents the slenderness ratio of the external corner reinforcement device around the y-axis; l 0y It represents the calculated length around the y-axis when the external corner reinforcement device is unstable; I ys represents the y-axis bending stiffness of the external corner reinforcement device; b y and b z Respectively represent the length of the right-angle reinforcement along the y-axis and the z-axis; h y and h z denote the length of the right-angle reinforcement along the y-axis and the z-axis, respectively; As and A denote the cross-sectional area and gross cross-sectional area of ​​the outer corner reinforcement, respectively; The stability condition in the z-axis direction is expressed as: In the formula, A s =bh+b y h y +b z h z in, It represents the axial compressive stability coefficient along the z-axis; represents the overall stability coefficient of the bending member along the y-axis; N represents the axial force acting on the external corner reinforcement device; M y and M z Respectively represent the bending moment along the y-axis and along the z-axis; N' Ez represents the equivalent Euler critical force of the outer corner reinforcement along the z-axis; E w represents the elastic modulus of the stiffening rib element; W y and W z Respectively represent the section modulus along the y-axis and z-axis; β mz and β ty They represent the equivalent bending moment coefficients for out-of-plane stability calculation along the z-axis and the y-axis respectively; z represents the cross-sectional plastic development coefficient along the z-axis corresponding to the cross-sectional modulus; η represents the cross-sectional influence coefficient of the external corner reinforcement device; f represents the yield stress of the external corner reinforcement device; λ z represents the slenderness ratio of the external corner reinforcement device around the z-axis; l 0z It represents the calculated length around the z-axis when the external corner reinforcement device is unstable; I zs represents the z-axis bending stiffness of the external corner reinforcement; b y and b z Respectively represent the length of the right-angle reinforcement along the y-axis and the z-axis; h y and h z They represent the length of the right-angle reinforcement along the y-axis and the z-axis respectively; As and A represent the cross-sectional area and the gross cross-sectional area of ​​the outer corner reinforcement respectively.

7. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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